keesan
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response 64 of 98:
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Feb 4 13:33 UTC 2000 |
I did a search on 'eye color' with AltaVista. From the first source:
Reliable Answers on Eye Color by the MIT Guy 1
By JJ Brannon
[1]jjbrannon@aol.com
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I was a student of Salvador Luria [Nobel Laureate for Genetics] at MIT.
Two brown-eyed parents can easily have a blue eyed child.
Two completely blue-eyed parents CANNOT have a fully brown-eyed child with
normal eye development except in certain extremely rare circumstances.
The gene for brown/blue eyes is EYCL3 found on Chromosome 15.
The gene for green/blue eyes is EYCL1 found on Chromosome 19.
Brown is the result of melanin deposits in the iris.
Green is the result of [this is debated] lipochrome deposits in the iris.
Blue-grey [and in some albinism, pink] is due to a lack of pigment in the iris
.
The underlayer, called the stroma, reflects light through its cells like
a mirror's silver back. How the pigment is distributed over the iris involves
other genes which produce flecks, rays, rings, partial diffusion or
full diffusion. This inheritance is very complicated and the genes have not
been well identified.
Here are some reliable sources:
http://www.ncbi.nlm.nih.gov/htbin-post/Omim/dispmim?227220
http://www.ncbi.nlm.nih.gov/htbin-post/Omim/dispmim?227240
http://www.gdb.org/gdb-bin/genera/genera/hgd/ObjectName/2662023?!sub=0
Francis Galton -- Davenport & Davenport -- Bryn & Winge -- Lenz -- Hughs
as discussed in
Human Genetics, Chapter 5, by Reginald Ruggles Gate [1952]
Heredity & Your Life, pp. 286-312, Boyd [1950]
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References
1. mailto:jjbrannon@aol.com
2. http://sln2.fi.edu/tfi/units/life/forums/anatomy/anatomy.html
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